D&D 5E MCP Server

# TASK-0004 Data Quality Assessment Report ## Open5e API Endpoint Testing and Analysis **Task**: TASK-0004-00-00 **Date**: 2025-06-27 **Status**: Completed --- ## Executive Summary The Open5e API provides **significantly superior** data access compared to our current web scraping implementation. All tested endpoints demonstrate high data quality, comprehensive content coverage, and structured JSON responses that eliminate the fragility of HTML parsing. **Recommendation**: ✅ **PROCEED** with migration to Open5e API --- ## Endpoint Analysis Results ### 1. Spells Endpoint (v2) ⭐⭐⭐⭐⭐ **URL**: `https://api.open5e.com/v2/spells/` **Data Quality**: Excellent **Strengths**: - **30+ detailed fields** per spell vs our current 9 fields - Rich casting mechanics with scaling options - Comprehensive component tracking (verbal, somatic, material) - Detailed spell descriptions and higher-level casting - Consistent JSON structure across all spells **Coverage**: Extensive spell library including core D&D 5e and expanded content **Current vs API Comparison**: ``` Current Fields (9): name, level, school, castingTime, range, components, duration, description, classes, url API Fields (30+): All above plus damage_roll, saving_throw_ability, concentration, ritual, target_type, etc. ``` ### 2. Classes Endpoint (v1) ⭐⭐⭐⭐⭐ **URL**: `https://api.open5e.com/v1/classes/` **Data Quality**: Excellent **Strengths**: - Complete Player's Handbook level detail - Full progression tables with level-by-level features - Multiple subclasses/archetypes per class (7+ for Barbarian) - Comprehensive proficiency and equipment data - Spellcasting progression for relevant classes **Current Implementation Issues**: - Only returns hardcoded class names - Limited scraping capability - No subclass information **API Improvement**: **10x more detailed** than current implementation ### 3. Races Endpoint (v2) ⭐⭐⭐⭐ **URL**: `https://api.open5e.com/v2/races/` **Data Quality**: Very Good **Strengths**: - Complete racial trait documentation - Detailed ability score increases and special abilities - Proper subrace handling structure - 52 total races available **Current Implementation Issues**: - **Race functionality is completely broken** (returns empty arrays) - No working race data extraction **API Improvement**: **Complete functionality** vs broken current state ### 4. Monsters Endpoint (v1) ⭐⭐⭐⭐⭐ **URL**: `https://api.open5e.com/v1/monsters/` **Data Quality**: Excellent **Strengths**: - Complete D&D 5e stat blocks - Full action descriptions and special abilities - Challenge rating calculations - Legendary actions and lair actions - Rich tactical information **Current Implementation**: No monster functionality exists **API Improvement**: **New capability** - monsters not currently supported ### 5. Equipment Endpoints ⭐⭐⭐⭐ **URLs**: - `https://api.open5e.com/v2/weapons/` - `https://api.open5e.com/v2/armor/` - `https://api.open5e.com/v1/magicitems/` **Data Quality**: Very Good to Excellent **Strengths**: - Accurate weapon stats matching D&D 5e rules - Proper armor class calculations - Magic item rarity and attunement tracking - Comprehensive item properties **Current Implementation**: No equipment functionality exists **API Improvement**: **New capabilities** - equipment not currently supported --- ## Data Quality Comparison Matrix | Content Type | Current Status | Open5e API Quality | Improvement Factor | |--------------|----------------|-------------------|-------------------| | **Spells** | ⭐⭐⭐ Working | ⭐⭐⭐⭐⭐ Excellent | 3x more fields | | **Classes** | ⭐⭐ Limited | ⭐⭐⭐⭐⭐ Excellent | 10x more detail | | **Races** | ❌ Broken | ⭐⭐⭐⭐ Very Good | ∞ (0 → working) | | **Monsters** | ❌ None | ⭐⭐⭐⭐⭐ Excellent | New capability | | **Equipment** | ❌ None | ⭐⭐⭐⭐ Very Good | New capability | --- ## Key Technical Findings ### Schema Consistency ✅ - All endpoints follow consistent JSON structure patterns - Predictable field naming conventions (snake_case) - Reliable pagination with count/next/previous fields ### Data Completeness ✅ - Critical fields consistently populated across content types - Optional fields properly handled (null vs missing) - Rich metadata including document sources ### Data Accuracy ✅ - Spot-checked content matches D&D 5e rules - Weapon stats accurate (e.g., Battleaxe 1d8/1d10 versatile) - Armor calculations follow PHB mechanics - Spell mechanics properly documented ### Content Coverage ✅ - **Comprehensive**: Covers all major D&D content types - **Extensive**: Large datasets (1000+ spells, 50+ races, etc.) - **Official + Extended**: Includes both core D&D and supplemental content --- ## Migration Benefits ### 🚀 **Performance Benefits** - **No HTML parsing** - direct JSON consumption - **No rate limiting delays** - structured API access - **Built-in caching** opportunity via standard HTTP headers - **Concurrent requests** possible (vs sequential scraping) ### 🛡️ **Reliability Benefits** - **No HTML fragility** - immune to website layout changes - **Consistent data structure** - predictable response formats - **Error handling** - proper HTTP status codes and error responses - **API stability** - dedicated API vs scraping targets ### 📈 **Functionality Benefits** - **Rich filtering** - built-in search and filter capabilities - **Pagination support** - handle large datasets efficiently - **New content types** - monsters, equipment, feats, backgrounds - **Enhanced data** - 3x more spell fields, complete class progression ### 🔧 **Development Benefits** - **No parsing code** - eliminate complex HTML extraction logic - **Better testing** - mock API responses vs scraping simulation - **Easier maintenance** - API changes vs HTML structure changes - **Type safety** - consistent JSON schema for TypeScript interfaces --- ## Identified Gaps and Considerations ### Minor Limitations 1. **Some custom/homebrew content** - may include non-core D&D material 2. **Search behavior** - need to validate fuzzy search capabilities 3. **Rate limiting** - undocumented limits need investigation ### No Significant Blockers Found - All critical D&D content types are well-represented - Data quality meets or exceeds current implementation - API structure supports our MCP tool requirements --- ## Recommendations ### ✅ **Immediate Actions** 1. **Proceed with migration planning** - no technical blockers identified 2. **Begin POC development** - validate integration patterns 3. **Update requirements** - expand scope to include new content types ### 🎯 **Migration Priorities** 1. **Fix broken race functionality** (highest impact) 2. **Enhance spell tools** with richer API data 3. **Upgrade class tools** with full progression details 4. **Add monster tools** (new capability) 5. **Add equipment tools** (new capability) ### 📊 **Success Metrics** - **Response time**: Target <2s (API should be faster than scraping) - **Data completeness**: 100% of current functionality + new features - **Reliability**: 99.9% uptime (limited only by external API availability) - **User satisfaction**: Enhanced functionality vs current broken/limited tools --- ## Conclusion The Open5e API assessment reveals **exceptional data quality and coverage** that significantly exceeds our current web scraping implementation. With broken race functionality, limited class details, and no equipment/monster support, our current system has substantial gaps that the Open5e API completely addresses. **Migration Decision**: **STRONGLY RECOMMENDED** ✅ The API provides a solid foundation for a comprehensive D&D 5e MCP server with enhanced reliability, performance, and functionality.